Description

Solution

To resolve this issue, do the following:

1. Open the the \sitecore\shell\Applications\Media\MediaFolder\MediaFolder.js file.
2. Comment out the line marked in bold:

   onUploadError: function(event) {
       console.warn("upload error. file: %s, message: %s", event.id, event.status);
       this.hadErrors = true;
     var row = $(event.id);
       ...
   }

3. Insert the following line after the commented one:

   var row = this.yUploader.isFlash? $(event.originEvent.id): $(event.details[0].target.id);

4. Clear the browser cache.